Liliko Chat is a fast and customizable Web chat system. It provides modern features such as desktop notifications, a responsive design, multiple languages and themes, and many more. Integration into existing community systems like phpBB 3 or MyBB is as simple as editing a config file.
Joker the IRC bot is a PHP class designed for quick and easy IRC bot construction. This base class contains methods that can be executed from your plugins. It has built-in flood protection, timers, and a powerful plugin system that allows you to reload plugin classes on-the-fly, without restarting the PHP console or disconnecting from the network.
Beem is an XMPP (Jabber) client for Android. Beem is compatible with any standard XMPP server or service (including Ejabberd, Openfire, Facebook, or Gmail). It supports SASL, proxying (Socks4, Socks5, HTTP), DNS SRV, and chatting with a specific resource. Beem is available on the Android market and on the software's own Web site.
Quassel IRC is a modern, cross-platform, distributed IRC client, meaning that one or more clients can attach to and detach from a central core, much like the popular combination of screen and a text-based IRC client, but graphical. In addition to this unique feature, it aims to be a comfortable chatting program.